Showing papers by "Aoyama Gakuin University published in 1974"
TL;DR: Most of the lead contained in sedge and voles within one of the most pristine, remote valleys in the United States is not natural but came from smelter fumes and gasoline exhausts.
Abstract: Most of the lead contained in sedge and voles (mountain meadow mice) within one of the most pristine, remote valleys in the United States is not natural but came from smelter fumes and gasoline exhausts. In a food chain, natural mechanisms do not allow lead to accompany the bulk of the nutritive metals as they proceed to higher trophic levels. This exclusion can be expressed quantitatively by a comparison of lead/calcium ratios at successive trophic levels. This ratio decreased by an overall factor of 200 in proceeding from rock, to soil moisture, to sedge, to vole. This factor would have been 1200 if lead aerosols had not collected on sedge leaves and circtumvented the tendency by sedge to exclude lead from the nutritive metals it absorbed from soil moisture.
89 citations
TL;DR: Glutamine synthetase (EC 6.3.1.2) has been purified from Bacillus stearothermophilus and Circular dichroism analyses of the enzyme show an α-helix, s-structure and unfolded conformation, and the inhibition of the Mg2- or Mn2+-activated enzyme seems to be cumulative.
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TL;DR: In this paper, the 2 H(α, αp)n reactions at 78.3 and 165 MeV lab energy are analyzed by the semi-phenomenological method which was introduced in a previous paper.
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TL;DR: In this article, the free energy of an electron gas with the long-range Coulomb interaction was discussed using the dielectric-response function which includes the higher-order exchange processes.
Abstract: We discuss the free energy of an electron gas with the long-range Coulomb interaction by using the dielectric-response function which includes the higher-order exchange processes Our result reproduces earlier results of Gell-Mann and Brueckner; Nozi\`eres and Pines; Hubbard; Englert and Brout; and others as special cases The longitudinal spin-fluctuation effect is included in the present result, but its role seems to be significantly different from what is expected in the Hubbard-type model due to the large cross effect of the spin fluctuation and charge fluctuation even in the paramagnetic state
5 citations
TL;DR: In this paper, the effect of different demand schedules and varying levels of competition on the performance of spatial price discrimination has been investigated in the context of homogeneous and heterogeneous local demand schedules.
Abstract: Under discriminatory pricing, the firm's marginal revenue is equated with its marginal cost at each market point in the space economy. This pricing practice is more profitable than the f. o.b. pricing schedule which involves equality of aggregate marginal revenue and marginal cost. From this departure point, the present paper determines the effect on the theory of spatial price discrimination of homogeneous and heterogeneous local demand schedules and different degrees of competition over economic space. By relaxing the customary assumptions of homogeneity and assuming varying levels of competition, better explanations of spatial pricing policies obtain. A case study is also presented to indicate the importance of the alternative assumptions made in spatial price discriminating theory. It is shown that different demand schedules and varying levels of competition tend to promote discriminatory prices over economic space.
TL;DR: The set of relations (1)∼(15) given in Section 1 turns out to be a set of generating relations.
TL;DR: In this article, the authors evaluate the price policy of a firm selling over a set of linearly extended buying points and derive the optimal spatial prices under alternative assumptions of consumer behavior and demand.
Abstract: The price of a good prevailing at some local market point may or may not be identical to the price of that same good at another market point. Price differentials over regions depend in part upon the number and locations of firms which sell to these regions, and on the demand curves of buyers. The present paper evaluates the price policy of a firm selling over a set of linearly extended buying points. It derives the optimal spatial prices under alternative assumptions of consumer behavior and demand. It demonstrates mathematically as well as graphically that a spatial monopolist maximizes profits by subdividing his market into economic submarkets, utilizing fob mill prices for some submarkets, and optimal discriminatory prices for the remaining ones. Thus it explains the use of fob pricing over selected distances in a firm's market area notwithstanding the apparently greater profitability of a discriminatory price policy throughout a firm's market space.